Direct answer: EPC switchgear selection should start from the system study and approved SLD, then align equipment ratings, protection, interfaces, drawings, testing and document submissions with the project specification. Early technical clarification prevents mismatched quotations and redesign.
Technical Comparison
| Factor | Option / Requirement A | Option / Requirement B |
|---|---|---|
| System design | Voltage, frequency, earthing, load flow and fault level | System study and approved SLD |
| Interfaces | Transformer, cables, protection, SCADA, civil works and auxiliary power | Interface schedule and approved drawings |
| Submittals | Datasheets, GA, SLD, wiring diagrams, component schedule and deviation list | Controlled document register and approval status |
| Quality | Routine tests, FAT, witness points, reports and packing inspection | Approved ITP, FAT protocol and inspection records |
| Delivery control | Drawing approval, production release, FAT closure, packing and shipment | Agreed project schedule and document milestones |
Selection Checklist
- Confirm nominal and highest system voltage.
- Confirm rated current, short-circuit duty and duration.
- Map every feeder from the approved SLD.
- Review protection, metering and remote-control requirements.
- State altitude, temperature, humidity, pollution and installation conditions.
- Define drawings, testing, FAT and handover documents.
Qiangchi Product Options
Qiangchi supplies QCL-12 RMU, QCL-24 GIS, QCL-40.5 GIS, XGN15 air-insulated RMU and YB compact substation. Rated current options include 630A, 1250A, 2500A and 3150A where applicable to the selected product and approved configuration.
Engineering Workflow
- Receive SLD, BOQ and specification.
- Review ratings, functional units and interfaces.
- Issue technical proposal and clarification list.
- Prepare project-specific GA and documents.
- Confirm inspection, routine tests and FAT scope.
- Complete export packing and shipment documents.
FAQ
Can I request a preliminary proposal?
Yes. Open items will be marked for technical confirmation.
Can the configuration be customized?
It can be evaluated against the SLD and actual product capability.
Are dimensions fixed?
No. Use the project-specific approved GA drawing.
What site data is required?
Temperature, altitude, humidity, pollution, corrosion, installation and seismic requirements where applicable.
Can FAT be witnessed?
The FAT and witness scope can be agreed during technical clarification.
What reduces quotation delays?
A clear SLD, system data, quantity, application, destination and document list.